Question: What is the Priority of Database Scoped Configurations over Global Configuration at Server Level?
Answer: This is a follow-up question.
Database Scoped Configuration Options in SQL Server
Database scoped configuration options change how one database behaves, without touching the server. This post lists all 41 options on SQL Server 2025, finds the 7 ids that are missing, and changes and restores two settings in a demo database. It also answers the old question about configuration id 5.
Missing tempdb Files: master_files vs database_files
Missing tempdb files show up as a mismatch between sys.master_files and tempdb.sys.database_files. This post compares the two with a query, simulates the missing files on a copy of the catalog, and shows the error log message that gives the cause. The fix is to correct the path and restart.
Why Query Cost Percentages in a Plan Mislead You
Test why query cost percentages are estimates by comparing two statements with STATISTICS IO, TIME, and query DMV counters.
Memory Grant Feedback Events: Capture Them in T-SQL
Memory grant feedback events list every query whose memory grant keeps changing, and the moment SQL Server gives up on it. This post creates the Extended Events session in T-SQL, watches it live in SSMS and reads it with one query that names the procedure.
Comparing a Good and a Bad Plan for One Query in Query Store
Compare a good and a bad plan in Query Store using runtime history, SSMS Compare Showplan, estimates, joins, grants, and parallelism.
SQL SERVER – MemoryGrantInfo Property Explanation
I have been writing about the Memory Grant Feedback feature. Today we will discuss various properties of MemoryGrantInfo in this blog post.
MemoryGrantInfo – What are Different Status of IsMemoryGrantFeedbackAdjusted? – Interview Question of the Week #253
Question: What are Different Status of IsMemoryGrantFeedbackAdjusted (MemoryGrantInfo Property)? Today we will see a consolidated answer to this question.
Stop Memory Grant Feedback: Database Setting and Query Hint
To stop memory grant feedback, use the hint or the setting that matches the mode of the plan. A tested demo shows that a row mode hint keeps a grant at 13,256 KB, while a batch mode hint changes nothing for a row mode sort. The post also corrects the setting names and shows the persistence switch.
Memory Grant Feedback Loop: When SQL Server Stops Adjusting
The memory grant feedback loop adjusts a grant after every run, and a query whose needs swing can send it back and forth. In a tested demo SQL Server stops adjusting on run 33 and falls back to its first grant. The post also shows what SQL Server 2025 does by default.